GIA anatomy of a diamond

A diamond’s cut determines how well a diamond’s facets interact with and reflect light. Cut is not be confused with shape, such as round, pear, or emerald.

The cut is often the most important aspect considered when grading diamond, contributing to the beauty and integrity of the stone. It takes precise craftsmanship to cut a diamond so that its proportions, symmetry, and polish deliver a maximum return of light – referred to in the industry as brilliance.Brilliance is the unique flashing, fiery effect that makes diamonds so mesmerizing.

S.B. Diamonds evaluates diamonds based on GIA proportions, which demonstrate how successfully a diamond interacts with light to create the following desirable visual effects.

BrightnessInternal and external white light reflected from a diamond.

FireThe scattering of white light into all the colors of the rainbow.

ScintillationThe amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the diamond.